JSON to CSV Converter

Paste a JSON array, get a CSV file. Auto-detects columns, flattens nested objects, handles edge cases. 100% Client-Side

Paste JSON Array

Preview

CSV Output

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Features

Automatically detects all columns from JSON keys
Flattens nested objects (e.g., address.city)
Properly escapes commas, quotes, and newlines in values
Handles arrays within values by joining them
Works with any valid JSON array — no size limit

What JSON format does this accept?

It accepts a JSON array of objects, like [{"key": "value"}, ...]. Each object becomes a row, and each unique key becomes a column. If objects have different keys, all keys are included and missing values are left empty.

How are nested objects handled?

Nested objects are flattened using dot notation. For example, {"address": {"city": "London"}} becomes a column called address.city with the value "London".

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